MSFinals-6723
A 38-year-old woman presents to the Emergency Department (ED) with chest and abdominal pain, following three days of severe vomiting secondary to gastroenteritis. She reports pain being worse on swallowing and feels short of breath. On examination, she looks unwell and has a heart rate of 105 bpm, a blood pressure of 110/90 mmHg, a respiratory rate of 22 breaths/minute and a temperature of 38 °C. Boerhaave syndrome is suspected.
What is the most appropriate initial investigation, given the suspected diagnosis?